Graphic card -> graphics card

I just pluralized 'graphics card' again. I think this is the more accurate way of writing it.

03/README.md

@@ -1,6 +1,6 @@
 ## Uniforms
 
-So far we have seen how the GPU manages large numbers of parallel threads, each one responsible for assigning the color to a fraction of the total image. Although each parallel thread is blind to the others, we need to be able to send some inputs from the CPU to all the threads. Because of the architecture of the graphic card those inputs are going to be equal (*uniform*) to all the threads and necessarily set as *read only*. In other words, each thread receives the same data which it can read but cannot change. 
+So far we have seen how the GPU manages large numbers of parallel threads, each one responsible for assigning the color to a fraction of the total image. Although each parallel thread is blind to the others, we need to be able to send some inputs from the CPU to all the threads. Because of the architecture of the graphics card those inputs are going to be equal (*uniform*) to all the threads and necessarily set as *read only*. In other words, each thread receives the same data which it can read but cannot change. 
 
 These inputs are called ```uniform``` and come in most of the supported types: ```float```, ```vec2```, ```vec3```, ```vec4```, ```mat2```, ```mat3```, ```mat4```, ```sampler2D``` and ```samplerCube```. Uniforms are defined with the corresponding type at the top of the shader right after assigning the default floating point precision.
 
@@ -58,4 +58,4 @@ Now it is time to try and challenge our understanding of this code.
 
 * Can you imagine an interesting way of changing this color pattern using ```u_time``` and ```u_mouse``` coordinates?
 
-After doing these exercises you might wonder where else you can try your new shader-powers. In the following chapter we will see  how to make your own shader tools in three.js, Processing, and openFrameworks.
+After doing these exercises you might wonder where else you can try your new shader-powers. In the following chapter we will see  how to make your own shader tools in three.js, Processing, and openFrameworks.